unblock_tty_out_signal  969 src/sysdep.c     unblock_tty_out_signal (&oldset);
unblock_tty_out_signal   33 src/syssignal.h extern void unblock_tty_out_signal (sigset_t const *);
unblock_tty_out_signal 4025 src/term.c           unblock_tty_out_signal (&oldset);
unblock_tty_out_signal 4161 src/term.c       unblock_tty_out_signal (&oldset);